title: Clusters of meningococcal disease in school and preschool settings in England and Wales: what is the risk?
mesh_terms: D002648:Child; D002675:Child, Preschool; D016000:Cluster Analysis; D004196:Disease Outbreaks; D004739:England / Q000453:epidemiology; D006801:Humans; D008589:Meningococcal Infections / Q000453:epidemiology* / Q000382:microbiology; D009345:Neisseria meningitidis / Q000145:classification; D011159:Population Surveillance; D018570:Risk Assessment / Q000379:methods; D012574:Schools; D012578:Schools, Nursery; D014852:Wales / Q000453:epidemiology